diff --git a/projects/zlib.net/package.yml b/projects/zlib.net/package.yml
index 640ce0ef..9e82c437 100644
--- a/projects/zlib.net/package.yml
+++ b/projects/zlib.net/package.yml
@@ -10,8 +10,11 @@ build:
     ./configure --prefix="{{prefix}}"
     make --jobs {{ hw.concurrency }} install
   env:
-    linux/aarch64:
-      CFLAGS: '$CFLAGS -fPIC'
+    linux:
+      CFLAGS:
+        - -fPIC
+        # undefined symbol errors in newer llvms prevent building shared libs
+        - -Wl,--undefined-version
 
 test:
   script: |